I have a new installation of 12.04 and I just copied over all my music to the ~/Music folder. Rhythmbox found all the mp3 and ogg files, but it refuses to import flac files. They simply do not appear in my music library.
If I start Rhythmbox on the command line and try to import a folder that contains flac files, absolutely nothing happens. Nothing is imported; no error messages.
I have all the dependencies for Rhythmbox installed, along with all the suggested and recommended packages. I can play a flac file with gst-launch-0.10 and gst-typefind-0.10 correctly identifies flac files as audo/x-flac.
Why does Rhythmbox refuse to see flac files? What can I do to find out what is happening?